How to find the total number of visitors?

There is no tab as such for getting visitors and page views from "beginning". But since you know your beginning i.e. last 2 weeks. On your left panel, Go to Audience ->Overview. Select the Date Tab located On the upper left side of your GA window. Select the duration(From and to Date, last two weeks in your case) for which you want to check the pageviews and visitors(Users as per GA terminology).

How to find the total number of visitors?

I don't even know where to go to begin. I am totally lost with all of the websites. All I need is a number for the annual report. How many times were our website visited last year 2017. How do I find this number?